/* =========================================
   DESIGN TOKENS
   ========================================= */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 720px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
}

/* =========================================
   LIGHT MODE (default)
   ========================================= */
:root, [data-theme="light"] {
  --color-bg: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-surface-2: #F1F3F5;
  --color-surface-offset: #E9ECEF;
  --color-divider: #DEE2E6;
  --color-border: #CED4DA;

  --color-text: #1A1A2E;
  --color-text-muted: #5A5E6B;
  --color-text-faint: #8B8FA3;

  --color-primary: #0EA5E9;
  --color-primary-hover: #0284C7;
  --color-primary-active: #0369A1;
  --color-primary-highlight: rgba(14, 165, 233, 0.1);

  --color-accent: #F59E0B;
  --color-accent-hover: #D97706;

  --color-header-bg: #1A1A2E;
  --color-header-text: #F8F9FA;

  --shadow-sm: 0 1px 2px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 26, 46, 0.12);
}

/* =========================================
   DARK MODE
   ========================================= */
[data-theme="dark"] {
  --color-bg: #0F0F1A;
  --color-surface: #161625;
  --color-surface-2: #1C1C30;
  --color-surface-offset: #22223A;
  --color-divider: #2A2A45;
  --color-border: #35355A;

  --color-text: #E2E2EF;
  --color-text-muted: #9A9AB5;
  --color-text-faint: #6B6B8A;

  --color-primary: #38BDF8;
  --color-primary-hover: #7DD3FC;
  --color-primary-active: #0EA5E9;
  --color-primary-highlight: rgba(56, 189, 248, 0.12);

  --color-accent: #FBBF24;
  --color-accent-hover: #F59E0B;

  --color-header-bg: #0A0A14;
  --color-header-text: #E2E2EF;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0F0F1A;
    --color-surface: #161625;
    --color-surface-2: #1C1C30;
    --color-surface-offset: #22223A;
    --color-divider: #2A2A45;
    --color-border: #35355A;
    --color-text: #E2E2EF;
    --color-text-muted: #9A9AB5;
    --color-text-faint: #6B6B8A;
    --color-primary: #38BDF8;
    --color-primary-hover: #7DD3FC;
    --color-primary-active: #0EA5E9;
    --color-primary-highlight: rgba(56, 189, 248, 0.12);
    --color-accent: #FBBF24;
    --color-accent-hover: #F59E0B;
    --color-header-bg: #0A0A14;
    --color-header-text: #E2E2EF;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}

/* =========================================
   SITE HEADER
   ========================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-header-bg);
  color: var(--color-header-text);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: box-shadow 0.3s ease;
}

.site-header--scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.site-logo svg {
  width: 40px;
  height: 40px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.01em;
  color: #FFFFFF;
}

.logo-sub {
  font-family: var(--font-body);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  opacity: 0.9;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header-nav a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-interactive);
}

.header-nav a:hover {
  color: #FFFFFF;
}

.header-nav .nav-cta {
  background: var(--color-primary);
  color: #FFFFFF;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-xs);
}

.header-nav .nav-cta:hover {
  background: var(--color-primary-hover);
  color: #FFFFFF;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.theme-toggle:hover {
  color: #FFFFFF;
  background: rgba(255,255,255,0.08);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: #FFFFFF;
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 768px) {
  .mobile-menu-btn { display: flex; }

  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-header-bg);
    flex-direction: column;
    padding: var(--space-4) var(--space-6);
    gap: var(--space-4);
    border-top: 1px solid rgba(255,255,255,0.06);
  }

  .header-nav.active { display: flex; }

  .header-nav a { padding: var(--space-2) 0; display: block; }
}

/* =========================================
   SITE FOOTER
   ========================================= */
.site-footer {
  background: var(--color-header-bg);
  color: rgba(255,255,255,0.7);
  padding: var(--space-12) var(--space-6) var(--space-8);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-brand .footer-tagline {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  font-style: italic;
  font-family: var(--font-display);
}

.footer-links {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-interactive);
}

.footer-links a:hover { color: #FFFFFF; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* =========================================
   HOMEPAGE
   ========================================= */
.hero-section {
  padding: clamp(var(--space-10), 6vw, var(--space-16)) var(--space-6);
  background: var(--color-surface);
}

.hero-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.hero-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-card-image {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-header-bg), #2A2A4E);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(14,165,233,0.15), rgba(245,158,11,0.1));
}

.hero-illustration {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-card-content {
  padding: var(--space-8);
}

.hero-category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.hero-excerpt {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
}

.hero-meta span { display: flex; align-items: center; gap: var(--space-1); }

.read-more-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
}

.read-more-link:hover { color: var(--color-primary-hover); }
.read-more-link svg { transition: transform var(--transition-interactive); }
.read-more-link:hover svg { transform: translateX(4px); }

@media (max-width: 768px) {
  .hero-card {
    grid-template-columns: 1fr;
  }

  .hero-card-image {
    aspect-ratio: 16/9;
  }

  .hero-card-content {
    padding: var(--space-6);
  }

  .hero-title {
    font-size: var(--text-xl);
  }
}

/* Article Grid */
.articles-section {
  padding: clamp(var(--space-10), 6vw, var(--space-16)) var(--space-6);
}

.articles-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.section-heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-divider);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.article-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-divider);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-card-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}

.article-card-image svg {
  width: 100%;
  height: 100%;
}

.article-card-body {
  padding: var(--space-5);
}

.article-card-category {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.article-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.article-card-title a {
  color: inherit;
  text-decoration: none;
}

.article-card-title a:hover {
  color: var(--color-primary);
}

.article-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 640px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}

/* =========================================
   CTA BANNER
   ========================================= */
.cta-banner {
  background: linear-gradient(135deg, var(--color-header-bg) 0%, #2A2A4E 100%);
  padding: var(--space-10) var(--space-6);
  text-align: center;
}

.cta-banner-inner {
  max-width: 640px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: #FFFFFF;
  margin-bottom: var(--space-4);
}

.cta-banner p {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-base);
  margin-bottom: var(--space-6);
  max-width: 100%;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-accent);
  color: #1A1A2E;
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}

.cta-button:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* =========================================
   ARTICLE PAGE LAYOUT
   ========================================= */
.article-hero {
  background: var(--color-surface);
  padding: clamp(var(--space-8), 5vw, var(--space-16)) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
}

.article-hero-inner {
  max-width: var(--content-narrow);
  margin: 0 auto;
}

.article-breadcrumb {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.article-breadcrumb a {
  color: var(--color-text-faint);
  text-decoration: none;
}

.article-breadcrumb a:hover { color: var(--color-primary); }

.article-category-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.article-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  flex-wrap: wrap;
}

.article-meta-bar span {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.article-meta-bar .meta-divider {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-faint);
}

/* Article body + sidebar layout */
.article-layout {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-10) var(--space-6);
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: var(--space-12);
  align-items: start;
}

/* Sidebar TOC */
.article-sidebar {
  position: sticky;
  top: 5rem;
}

.toc-container {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid var(--color-divider);
}

.toc-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.toc-list a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--transition-interactive);
  line-height: 1.4;
}

.toc-list a:hover {
  color: var(--color-primary);
  background: var(--color-primary-highlight);
}

.toc-list a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  background: var(--color-primary-highlight);
  font-weight: 600;
}

/* Mobile TOC */
.toc-mobile {
  display: none;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-8);
}

.toc-mobile-toggle {
  width: 100%;
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
}

.toc-mobile-toggle svg {
  transition: transform 0.2s ease;
}

.toc-mobile-toggle.open svg {
  transform: rotate(180deg);
}

.toc-mobile-content {
  display: none;
  padding: 0 var(--space-4) var(--space-4);
}

.toc-mobile-content.open { display: block; }

.toc-mobile-content .toc-list a {
  padding: var(--space-2) var(--space-3);
}

@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar { display: none; }
  .toc-mobile { display: block; }
}

/* Article prose */
.article-content {
  max-width: var(--content-narrow);
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-5);
  padding-top: var(--space-4);
  scroll-margin-top: 5rem;
}

.article-content h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  scroll-margin-top: 5rem;
}

.article-content h4 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.article-content p {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  max-width: 100%;
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
}

.article-content li {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  max-width: 100%;
}

.article-content strong {
  font-weight: 700;
  color: var(--color-text);
}

.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-content a:hover { color: var(--color-primary-hover); }

.article-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-primary-highlight);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
}

.article-content blockquote p {
  margin-bottom: 0;
  color: var(--color-text);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin: var(--space-8) 0;
}

/* Tables in articles */
.article-content table {
  margin: var(--space-6) 0;
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: var(--text-sm);
}

.article-content thead {
  background: var(--color-surface);
}

.article-content th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-divider);
}

.article-content td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text);
}

.article-content tr:last-child td { border-bottom: none; }

/* Key Takeaways box */
.key-takeaways {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
}

.key-takeaways h2 {
  font-family: var(--font-body);
  font-size: var(--text-base) !important;
  font-weight: 700 !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent) !important;
  margin-top: 0 !important;
  margin-bottom: var(--space-4) !important;
  padding-top: 0 !important;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.key-takeaways ul {
  margin: 0;
  padding-left: var(--space-5);
}

.key-takeaways li {
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}

.key-takeaways li:last-child { margin-bottom: 0; }

/* Article inline CTA */
.article-cta {
  background: linear-gradient(135deg, var(--color-header-bg) 0%, #2A2A4E 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  margin: var(--space-10) 0;
}

.article-cta h3 {
  font-family: var(--font-display) !important;
  font-size: var(--text-lg) !important;
  font-weight: 400 !important;
  color: #FFFFFF !important;
  margin-top: 0 !important;
  margin-bottom: var(--space-3) !important;
}

.article-cta p {
  color: rgba(255,255,255,0.7) !important;
  font-size: var(--text-sm) !important;
  margin-bottom: var(--space-5) !important;
}

.article-cta .cta-button {
  font-size: var(--text-sm);
}

/* Related articles */
.related-articles {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.related-articles h2 {
  font-family: var(--font-display) !important;
  font-size: var(--text-lg) !important;
  margin-top: 0 !important;
  margin-bottom: var(--space-6) !important;
  padding-top: 0 !important;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.related-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  text-decoration: none;
  transition: border-color var(--transition-interactive), transform var(--transition-interactive);
}

.related-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.related-card-category {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.related-card-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.3;
}

@media (max-width: 640px) {
  .related-grid { grid-template-columns: 1fr; }
}

/* Disclaimer */
.article-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-style: italic;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  line-height: 1.6;
}

/* =========================================
   HOMEPAGE-SPECIFIC
   ========================================= */
.homepage-intro {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-10), 5vw, var(--space-16)) var(--space-6) 0;
  text-align: center;
}

.homepage-intro p {
  max-width: 640px;
  margin: 0 auto;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* =========================================
   UTILITY
   ========================================= */
.container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Smooth scroll target offset */
[id] {
  scroll-margin-top: 5rem;
}